Download .NET Framework 1.1 Service Pack 1 CLR Security Update for Windows 2003 Server x86 and Windows 2003 Server R2 x86 from Official Microsoft Download Center

.NET Framework 1.1 Service Pack 1 CLR Security Update for Windows 2003 Server x86 and Windows 2003 Server R2 x86

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A security issue has been identified that could allow an attacker to tamper with digitally signed content without being detected, when this content is being consumed by an application that makes uses of the Microsoft .NET Framework on a Windows-based system.